citra/src/common/key_map.h

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <tuple>
#include "core/hle/service/hid/hid.h"

namespace KeyMap {

/**
 * Represents a key for a specific host device.
 */
struct HostDeviceKey {
    int key_code;
    int device_id; ///< Uniquely identifies a host device

    bool operator<(const HostDeviceKey &other) const {
        return std::tie(key_code, device_id) <
               std::tie(other.key_code, other.device_id);
    }

    bool operator==(const HostDeviceKey &other) const {
        return std::tie(key_code, device_id) ==
               std::tie(other.key_code, other.device_id);
    }
};

/**
 * Generates a new device id, which uniquely identifies a host device within KeyMap.
 */
int NewDeviceId();

/**
 * Maps a device-specific key to a PadState.
 */
void SetKeyMapping(HostDeviceKey key, Service::HID::PadState padState);

/**
 * Gets the PadState that's mapped to the provided device-specific key.
 */
Service::HID::PadState GetPadKey(HostDeviceKey key);

}